Dust guard for watches



me 192 7 SONNENTHAL DUST GUARD- FOR WATCHES Filed May 25, 1926 INVENTOR. /rw y dbnnen/hal BY 3- MM k *ATTORNEYS.

Patented June 21, 1927.

l. "uu rrsn Es 1,633,351 PATNT. OFFICE.

IRVING SONNENTHAL, ornnwyoax, iv; Y.

' v I imsr GUARD roa WATCHES.

Application filed May 25,

I watch has been adapted either to be carried by the watch bezel or loosely seated on the guard member and clamped in place by the bezel. The disadvantage of the prior construct-ions is that when the bezel is lifted,

' foreign material easily gets beneath the crystal and into the interior of the watch.

An object of the present invention is to provide a dust guard for watches in which the above defects are to a large extent eliminated.

A more specific objectof the invention is to provide a full sided guard member extending around the periphery of the watch in which the crystal of the watch is adapted to snugly fit and be frictionally maintained in place by the guard member.

A further object of the invention is to provide means for so maintaining the crystal frictionally in place within the guard member.

lVith these and further objects in view, the invention further resides in certain details of construction and arrangement of parts which will be apparent from the following description of the accompanying drawings which form a part of this specification.

In the drawings:

Figure 1 is a face View of a watch equipped with the novel guard member;

Figure 2 is a side view of the watch;

Figure 3 is a sectional view showing the disposition of parts in service; and

Figure 4 is an isolated View of the guard member.

The numeral 10 indicates the case center of the watch in which the watch movement is contained and around the periphery of the case center extends the full sided guard member 11 which is provided with a flange 12 at its lower end. The shape of the guard member will, of course, depend upon the shape of the watch and may be oval or circular or, in fact, any other shape. A gasket 13, which may be made of cork or any, other material suited for the purpose, fits within 1926. Serial No. 111,487.

the guard member and on this gasket the crystal 14 of the watch fits. Two outer bezels, 15 and 16, surround the exterior of the guard member, the bezel 15 being flanged to overlap the crystal.

As best seen in Figure 4, the edge of the guard member 11 is provided with slots 17 and a larger slot 18 for the winding stem 19 of the watch.

The purpose of theslots 17 is to add to the resiliency of the guard member so that when the crystal 14 is seated on the gasket it is frictionally held in place within the guard member by the action of the serrated edge'of the guard member. Therefore, when the bezel 15 of the watch is lifted, the crystal 14 remains in place and consequently continues to exclude dirt and moisture from the interior of the watch. It will be understood, of course, that the materials of which the various parts are composed do not form any part of the present invention. In the cheaper grade of watches, brass may be employed for the material of the guard member, while in the more expensive watches, gold may be employed. The materials used will depend to a large extent on individual choice.

Many variations and alterations may be made in the above described structure with out departing from the spirit of the above invention and I desire to be limited only by the prior art and the scope of the appended claims.

What I claim is:

1. The combination with the body of a watch case and a watch movement having a winding stem, of a. full sided guard member extending around the periphery of the watch, a crystal for the watch adapted to fit within the outer edge of the guard memher whereby the guard member serves to protect the periphery of the crystal, and a cover for the watch adapted to fit over the guard member, and having an inwardly turned flange overlapping the periphery of the crystal.

2. The combination with the body of a watch case and a watch movement, of a full sided guard member extending around the, periphery of the watch and a. crystal for the watch adapted to snugly fit in. the guard member, said guard member having a serrated edge to add to its resiliency and to enable it to frictionally maintain the crystal in service position.

3. The combination with the body of a watch case and a Watch movement of a full sided guard member extending around the periphery of the Watch, a gasket for the Watch, and a crystal adapted to snugly fit in the guard member against the gasket, said guard member having a serrated edge to add to its resiliency and to enable it to frictionally maintain the crystal in service position.

In testimony whereof, I have signed my 10 name to this specification this 22nd day of May, 1926.

IRVING SONNENTHAL. 

